Which of the following statements is/are true of positivism ?

a. Positive aims to be value free and ethically neutral.

b. Positivism patterns itself on the natural sciences in deciding about the right and wrong of issues.

c. Positivism contends that statements are to be empirically tested by observation to assess their truth or falsity.

d. Positivism affirms the place of cultural preferences and practices in the determination of the truth.

Select the correct answer :